Home / 21,052.61-31,578.89-10,664.36

Finding the Fourth Proportional to 21,052.61, 31,578.89 and 10,664.36

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Solution

The fourth proportional to 21,052.61, 31,578.89 and 10,664.36 is: 15,996.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.61 : 31,578.89 = 10,664.36 : x
  2. Step 2: Convert to fraction form
    21,052.61/31,578.89 = 10,664.36/x
  3. Step 3: Cross multiply
    21,052.61x = 31,578.89 × 10,664.36
  4. Step 4: Simplify right side
    21,052.61x = 336,768,440.14
  5. Step 5: Solve for x
    x = 336,768,440.14/21,052.61
  6. Step 6: Final answer
    x = 15,996.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.